Tcl Alcatel pixi4-4.5 tf Technical manual

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Pixi4-4.5 TF

A570BL & A571VL

Note: this manual is non-contractual and TCL Communication Ltd. can modify it without prior

notice on the characteristics of described equipments.

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1.0 2016-02-16 Draft creation Peter Ye Abby Zhou Shawn Xiao

Rev. Date Modification description Prepared By Checked By Approved By

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Content

1Level 2 repair process ..............................................................................................4

2Warranty Check and Visual Inspection ...................................................................5

2.1Warranty confirmation of L1.....................................................................................5

2.2Visual mechanical check..........................................................................................6

2.3Pretest........................................................................................................................7

5Disassembly and assembly A570BL/A571VL .......................................................14

5.1ESD Safety...............................................................................................................14

5.2Disassembly tool.....................................................................................................14

5.3Disassembly process..............................................................................................15

5.4Reassembly Process ..............................................................................................22

5.5Disassembly process evaluation...........................................................................23

6Disassembly Complete...........................................................................................24

7Level 2 repair...........................................................................................................25

8Other component exchange...................................................................................33

9Final test ..................................................................................................................34

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1 Level 2 repair process

Reassembly

Record in BIG

End

OK

Retest

OK

Start

Visual Inspection

Warranty Check

Pretest & Failure confirm

SW Upgrade

Disassembly

L2 Repair

Retest

Function test

NG

Restore User Information

Back up user data

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2 Warranty Check and Visual Inspection

2.1 Warranty confirmation of L1

1) IMEI sticker check:

a) Power on the handset, enter *#06#

b) If the IMEI sticker in the back casing is not lost:

We should make sure that the IMEI number must be the same with the one on the IMEI sticker; if

not, it’s out of warranty policy

2) Humidity sensitive label

If humidity sensitive label is not good, the cell phone will be considered as out of guarantee.

a) Liquid was detection by humidity sensitive label

b) Position of humidity sensitive sticker.

Humidity sensitive sticker is on the bottom of the front casing.

Here is the

humidity sensitive

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2.2 Visual mechanical check

Mechanical warranties check items:

1) Corrosion

Corrosion on the USB connector, SIM connector, and other metal surfaces。

2) Hole (diameter > 1mm)

Holes on any surface, including the front casing, furnished frame, battery cover, touch Lens,

keypad…

3) Bump

Bumps (diameter > 1mm) on any surface, including front casing, decorate frame, battery

cover, touch Lens, keypad, etc.

4) Scratch

Scratches (length > 3mm) on any surface, including the front casing, decorate frame, battery

cover, touch Lens, keypad, etc.

5) Distortion

Bend, twisted or crushed on the h/s, cover/casing or connectors, etc.

6) Broken

Touch broken, casing/cover broken, etc.

7) Dropped

Keypad tear off, touch lens, connectors dropped, etc.

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8) Gap

External physical damage relating to abnormal use, like front case and frame opened

9) Others

Damage caused by disassembly ,wrong part assembly, loss of components

Use in abnormal environment like high temperature causing plastic melts

2.3 Pretest

1) Check that the SIM card is set correctly.

2) Power on the cell phone.

3) If the cell phone asks to input NCK code, this means it is SIM locked and can only be worked

with dedicated SIM card. Use the correct SIM card.

4) Enter the phone code if necessary.

5) After the phone power on, test step by step with the auto test code:

Press *#2886# in dial screen and then you will see the interface displaying the SW version. Select

“Auto” to start the auto test, or select “MANU” to do the MMI test manually.

If one of the tests failed during “Auto” test mode, it will show “Text[X] xxx failed. Restart?”, press “YES”

to retest, press “Next” to go on next test and press ”NO” to finish test.

TRACABILITY

I. You can get some information such as IMEI, CU-REF, PTM, Date Code, etc.

II. Press “Pass” to continue.

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Check Tunning

I. It will check the test automatically, and it will show “Pass” if it functions well;

II. Press “PASS” to continue.

TP RAW DATA

I. It will check the test automatically, and it will show “Pass” if it functions well;

II. Press “Pass” to continue.

Touch panel

I. Please draw on the yellow area and it will show “TEST RESULT OK!”;

II. Press “Pass” to continue;

Display

I. You will see the LCD display three colors: RED, GREEN and BLUE if it

functions well;

II. Press “Pass” to continue;

LCD BLACK

I. You will see the LCD displays black if it functions well;

II. Press “Pass” to continue;

LCD GRAYCHART

I. You will see the LCD displays grey if it functions well;

II. Press “Pass” to continue;

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LCD GRAYLEVEL

I. You will see the LCD displays grey level if it functions well;

II. Press “Pass” to continue;

LCD WHITE

I. You will see the LCD displays white if it functions well;

II. Press “Pass” to continue.

KEYBOARD

I. Press the key displayed on the screen. The key on the screen will turn grey

when you press it if it functions well;

II. Press “Pass” to continue.

LCD BACKLIGHT

I. The screen backlight will be flashing if it functions well;

II. Press “Pass” to continue.

Front CAMERA

Press “Pass” to continue if the main camera functions well.

MAIN CAMERA

Press “Pass” to continue if the front camera functions well.

CAMERA LED

I. Camera LED will turn on if it functions well;

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II. Press “Pass” to continue.

AUDIO

I. You will hear a voice prompt which introduces some emergency call numbers

from the receiver if it functions well;

II. Press “PASS” to continue;

III.You will hear a voice prompt which introduces some emergency call numbers

from the speaker if it functions well;

IV. Press “Pass” to continue;

V. Make a noise near the MIC, you will hear it from the receiver if it functions well;

VI. Press “Pass” to continue;

VIBRATOR

I. You can feel the phone’s vibrating if it functions well;

II. Press “Pass” to continue.

ACCESSORY

I. Insert headset according to the instruction and you will hear a voice prompt

which introduces some emergency call numbers through the headset left if it

functions well;

II. Press “Pass” to continue;

III.You will hear a voice prompt which introduces some emergency call numbers

through the headset right if it functions well;

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IV. Press “Pass” to continue;

V. Make a noise near the headset mic, you will hear it from headset if it functions

well;

VI. Press “Pass” to continue;

VII. You will hear FM playing and FM frequency will be displayed on the screen if it

functions well;

VIII. Press “Pass” to continue;

IX. Remove headset according to the instruction;

X. Press “Pass” to continue.

FM

I. Insert headset according to the instruction and you will hear a voice, you

can touch the screen to change the frequency ;

II. Press “Pass” to continue.

USB/CHARGER

I. Insert USB cable according to instruction and it will say “USB: OK” if it functions

well;

II. Remove USB cable according to instruction and press “Pass” to continue.

GSENSOR

I. Put the handset towards up according to instruction;

II. Press “Pass” to continue;

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III.Put the handset “face down”, “down”, “left”, “right” and “face up” according to

instruction, and then the instruction will disappear and it will say “All positions

checked” if it functions well;

IV. Press “Pass” to continue.

SIM

I. Insert SIM card and the phone will detect it if it functions well;

II. Press “Pass” to continue.

SD CARD

I. Insert SD card and the phone will detect it if functions well;

II. Press “Pass” to continue.

BATTERY

I. It will display the value of battery temperature, battery content, battery voltage

and battery ID if it functions well;

II. Press “Pass” to continue.

BLUETOOTH

I. Bluetooth will search automatically and it will display device address if it

functions well;

II. Press “Pass” to continue.

WIFI

I. It will search for WIFI hotspot and it will display searched result on the screen if it functions

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well;

II. Press “Pass” to continue.

GPS

I. It will run GPS and search for satellite, and then it will display info such as

“PRN”, “SNR”, etc. on the screen if it functions well;

II. Press “Pass” to continue.

Calling

I. It will make a Emergency call if it functions well;

II. Hang up to continue.

Secinfo

I. It will show some info in the screen;

II. Press pass to continue.

Factory Reset

I. It will ask if you want to reset your device;

II. Press “reset” will reset the phone,if you don’t want to press “back”.

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5 Disassembly and assembly A570BL/A571VL

5.1ESD Safety

Please wear static loop or static glove

5.2Disassembly tool

You may use the following tools during the disassembly and reassembly procedure:

Plastic Flake Tweezers Screwdriver

Soldering iron Pry bar Hot wind gun

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5.3 Disassembly process

The steps of disassembly A570BL & A571VL are as below.

This module should only be disassembled from bottom to top.

Step 1: Remove battery cover and battery, and then take off 9 screws with screwdriver.

Step2: Sparate the furnished frame from furnished front casing by using plastic flake.

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Step 3: Disconnect the Side key ,TP FPC, LCD FPC, Main Camera ,RF then pull up PCBA by using

plastic flake and remove it from furnished front casing.

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Step 4: Remove front camera, Speaker, ANT sub EBOM ,MIC_rubber with tweezers.

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Step 5: Remove side key and vibrator by using soldering iron; (Temperature：Lead-free technology

330℃±10℃，time：5~6 seconds).

Step 6: Disassemble TP +LCD from the casing.

(1) Please use hot wind gun to heat up touch panel around the four edges. (Temperature:

130 ±10 ,℃℃Air Level: 3, Height: 10mm, Time: 40s-60s)

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(2) Push the touch panel by using pry bar.

(3) Then swipe along the four edges of TP with plastic flake and separate TP and LCD from

furnished front casing carefully. (Note: Be careful not to damage TP FPC and LCD FPC when

swiping along the top edge)

TCL Alcatel Pixi4-4.5 TF Technical manual

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